Added Application class.
Updated IWingsApplication inteface.
- Application renamed to WingsApplication.
- Added common IApplication interface to force WingsApplication type.
Added IWingsCommand.
Added IWingsModel and IWingsView and added comments to interfaces.
Added WingsCommand class.
Added WingsModel class.
Added WingsView class.
Updated the implementation of WingsView.
Docuemented view intefaces.
Added IValueObject interface and its default ValueObject implementation.
Added default TransferObject for client and server data exchange.
Added ModelState class containing possible states for a model.